Don't use the Sharp Aquos. The color reproduction on the 32in and the 65in LCD's is inconsistant and terrible for a pc output if you are doing any sort of photo editing. For gaming and general work they are fine but if you get into any finer color details stay away from the Sharp Aquos.
Let me know how that went. I got an SLI setup and would have loved a second monitor when doing work ... i guess theoretically you could disable SLI when you want two monitors and leave both plugged in?
Definately go LCD. Get 42in or bigger. I've got a 42 philips plasma and 42 vizio and a 52 samsung and both lcd's blow the plasma away. Plus they were lighter and easier to hang on the wall and produce less heat.